Soviet 45mm Gun 21K 3D model

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The 45mm Anti-Aircraft Gun (21-K) Got Its Start In Soviet Design Adapted From The 45mm Anti-Tank Gun M1937 (53-K). This Copy Was A Version Of A German Designed By Rheinmetall That Sells To Soviets Before Hitler Took Over In 1933. They Brought It Up To Size, Going From 1.5 In (3.7 Cm) German Weapon. This Soviet Gun Had An 18-Inch (45 Mm) Barrel, Which Boosted Its Penetrating Power. The Soviets Kept This Mainstay As Primary Light Anti-Aircraft Gun And Put It On Almost Every Ship That Went Out Between 1934-1939 World War Two Years To Serve Its Time Well Until After Cold War Was Finished They Finally Replace With More Modern Tech